Apparatus for twisting and winding yarn



1947- P. F. MARTINEZ 31,

APPARATUS FOR TWISTING AND WINDING YARN Filed May 26, 1945 I NV E N TOR PEDRO FRANQUET MARTINEZ BY MW ATTORNEYS.

Patented Nov. 25, 1947 OFFICE APPARATUS FOR TWISTIN G AND WINDING YARN Pedro Franquet Martinez, Barcelona, Spain Application May 26, 1945, Serial No. 596,000

In Spain October 5, 1944 I 2 Claims.

1 This invention relates to a new and, improved method for the continuous production of slivers or rovings, and yarns, and to an improved appara-' spool, cop, or the like into the said vessel. Keeping the end of the thread fixed, the yarn wound along the walls of the rotary vessel is caused to be wound rapidly onto the spool, and the latter is thereafter withdrawn. Thus, in a very brief time, the change or transfer operation is accomplished, without it having been necessary to stop the machine for this purpose.

The spinning process, according to this invention, is divided into two phases; the first, or spinning phase, in which the drawing and twisting of the yarn takes place, the yarn remaining wound along the inner walls of the rotary vessel; the second, or winding phase, during which the yarn produced in the first phase is wound onto the spools and removed from the rotary vessel, whereupon a new spinning phase is immediately commenced, during which and while new yarn is being produced, the new operation of replacing the filled spools with empty spools takes place.

During the spinning phase, the "distribution of the yarn spires or coils within the rotary vessel is secured by imparting to the last yarn holder, which in this process is a pneumatic ejector device, a reciprocating motion along the axis of the said rotary vessel. It is also thereby possible to achieve an adequate distributign of the spires or coils in either cylindrical layers, parallel to the axis of the vessel, or in conical layers.

The present spinning process does away with rotary spools and also with brakes of the spools of the flyer machine. It likewise does away with the rotary cursors of the ring machines, and thereby the yarn does not have to drag any mass in'motion or overcome any mechanical resistance. On the other hand, since the movement of the yarn always takes place in the direction of its length, and the rotation of the yarn occurs around its own axis, no sags will be formed, such as are usually encountered in spinning machines. It will therefore not be necessary, to overcome the air resistance, so that the strains or stresses to which the yarn will be subjected at any point of its travel will be reduced exclusively to the traction generated by the centrifugal force of the-portion of the yarn rotating in the interior of the vessel. This force being comparatively small, it will be readily understood that no rupturing of the yarn will occur during spinning. It will thereby be possible to increase to a considerable extent the number of revolutions per minute of the rotary vessels, consequently speedingup and increasing production.-

The operating speed of the machine in the present spinning process willv be limited, rather by the resistance of the materials employed in its construction, than by the possibility of the yarn attaining a strain higher than its breaking load.

In the instant spinning process, the rotary vessels in which the yarn will be wound may be extended or enlarged in the direction of their aXis of rotation, or, on the contrary, the diameter may be larger than its height, it being possible for the said vessels to be equal to the diameter of the skeins, This has the advantage of permit-- ting the arrangement of theyarnin skeins on the spinning machine.

It is possible, with the present spinning process for the rotary vessels to have their axes disposed either horizontally or vertically as it may be deemed best suited or adapted to the construction or operating requirements of the machines.

In machines wherein the rotary vessels have a diameter considerably larger-than their height with the purpose of arranging the yarndirect in the form of skeins, it will be possible to dispense with a folding device for winding the yarn in uniform layers, leaving it free, since the scant height which it will reach in the direction of the axis of rotation of the vessel will make it possible for its distribution to be regulated automatically.

Another feature of the instant spinning process when applied to the fiyer frames, is that the yarnsthe slivers or rovings, in this instancewill be subjected during the twisting and winding to only a very weak tension. It will be then possible to dispense with the control mechanism of the bobbins, the construction of the flyer frames being thereby considerably simplified.

In the'spinning process described herein, the spinning machines or the fiyer frames will operate in all their parts during the first or spinning phase proper. However in the second or winding phase, it will not be necessary, for removing the yarns produced by the machines, to stop the machine entirely. The machine is provided with a clutch mechanism permitting the stopping or cutting off the drawing means only, thereby ceasing the production of yarn. However, the rotary vessels will continue to move at the same speed as that during the production phase. The movable pneumatic yarn-holder or carrier is then immediately withdrawn from the interior of the vessel, and atthe same time there is introduced in its ANN N W1 7; W,

place the spools or cops on which the yarn is to be wound. The yarn, as it has an end thereof held by the yarn-holder or carrier, and because the rotary vessel is still in motion, is thus rapidly wound onto the spools.

Once the yarns are wound onto the spools, it will be necessary to cut the ends which are still attached to the yarn-holder. This is accomplished by means of a device I which presses the yarn 8 against the edges 9 of the rotary vessels, which are beveled for this purpose. In this manner and by reason of the highspeed, all

' of the yarns of the machine are out off-in a single operation.

After the yarns are cut ofi, the filled spools are withdrawn from the interior of the vessels, and the pneumatic yarn-holders are again introduced, from which yarn-holders the ends of the freshly cut yarns depend.

During all of the aforedescribed operations the vessels are kept turning, and only the drawing and checking cylinders of the machines will have been stopped.

To resume the spinning, the drawing device isv started again, and in order that the ends of the yarns may be placed in contact with the rotary vessels and be pulled by same, air is injected into the pneumatic yarn-holders, and the pneumatic pulling or dragging of the yarns is thereby obtained. This takes place only when the yarns have been already set in motion, whereupon the air admission is shut off, the spinning continuing normally until a suflicient amount of yarn accumulates inside the vessels to permit new spools being filled, and in the meantime the spools which have been previously filled are changed and replaced with empty ones.

To make the foregoing description clear, and only by way of illustration, reference is made to the annexed drawing, in which Figure 1 shows diagrammatically a device according to the present invention, the elements of the device being shown in their position during the spinning phase, while Figure 2 diagrammatically illustrates said device, with the elements shown in their position during the winding phase.

As shown in Figure 1, the yarn after leaving the rollers-or cylinders of drawing device I, passes through the interior of pneumatic yarnholder 2. During this phase, said yarn-holder 2 is suspended and located inside rotary vessel 4. The yarn upon leaving the pneumatic yarnholder or feeder 2 is then wound inside rotary vessel 4 along the inner walls thereof, as indicated by the reference numeral 6. During this spinning phase proper, the spool 3 is located external to vessel 4.

Fig. 2 shows the relative position of the same members during the second or winding phase of winding, in which the pneumatic yarn-holder or feeder 2 is now outside of rotary vessel 4, the spool 3 having been introduced in its place. During this phase, the drawing device I remains stationary, whereas rotary vessel 4 continues to rotate the same as during the first or spinning phase proper. Fig. 2 also shows the position of the yarn, which is stretched from the drawing cylinders I and through the yarn-holder or feeder 2 to spool 3, which is now located inside rotary vessel 4, where, by reason of the rotation of said vessel, the yarn will be gradually wound unto the spool, as shown by the reference numeral 6.

The following are the phases and operat ons of the improved process from the time in which the pneumatic yarn-holders or carriers or feeders 2 are introduced into vessels 4:

The first or spinning phase 1st operation.Supplying air to the yarnholders or carriers or feeders.

2nd operation.Starting the drawing mechanism.

3rd operation.Shutting oif the supply of air to the yarn-holders.

4th operation.-While the spinning continues, replacing the filled spools with empty ones.

The second or spool wind'ing phase 5th ope ation.Stopping off the drawing mechanism.

6th operation.Removing the yarn-holders from the rotary vessels, and introducing empty spools in their place.

7th operation-Cutting off the yarns.

8th operation-Withdrawing the filled spools and reintroducing the yarn-holders inside the rotary vessels.

There has been explained the principle and mode of operation of this invention and there has been described an embodiment thereof. It is desired to have it understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically described and illustrated.

What is claimed is:

1. In a centrifugal spinning, twisting or like machine, which comprises a rotary vessel with upward directed opening, in the interior of which the yarn is wound on the wall, said yarn passing through a yarn-holder which is placed in the interior of the vessel and capable of a back-andforth movement, and a spool outside the vessel, means for withdrawing the yarn-holder from the interior of the rotary vessel, and simultaneously introducing in its place an empty spool, and means for putting the yarn spread between the spool freshly introduced into the vessel and the yarn-holder situated outside, under tension, and

forcing it against the rim of the vessel, said rimcutting the yarn simultaneously with the yarn contained in the vessel being wound up onto the spool, and means for the exchanging of the spool for the yarn-holder.

2. In a centrifugal spinning, twisting or like machine as claimed in claim 1, means for introducing compressed air into the yarn-holder during its penetration into the interior of the vessel, the interior of the latter housing the loose end of the yarn hanging from the drawing cylinders after the yarn has been cut in the preceding operation, so that said compressed air blows the yarn and drives it to the interior of the rotary vessel.

PEDRO FRANQUET MARTINEZ.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 802,161 Gill Oct. 17, 1905 874,662 De Vito Dec. 24, 1907 1,800,830 Gordon Apr. 14, 1931 2,117,675 Negishi May 17, 1938 2,232,491 Prince-Smith Feb. 18, 1941 2,232,490 Prince-Smith Feb. 18, 1941 2,142,760 Prince-Smith Jan. 3, 1939 2,232,489 Prince-Smith Feb. 18, 1941 

